<html>
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
	<title>Document</title>
</head>
<body>
	<p>点击下面的按钮，循环遍历对象“person”的属性。</p>
	<button onclick="myFunction()">点击这里</button>
	<p id="demo"></p>
	<script type="text/javascript">
		function myFunction(){
			var x;
			var txt="";
			var person={fname:"Bill",lname:"Gates",age:56};
			for (x in person){
				txt=txt + person[x];
			}
			document.getElementById('demo').innerHTML=txt;
		}	
	</script>
</body>
</html>